kernel: update to 3.18.71

Delete a bunch of fixes that are already included.
Refresh patches.
Compile-tested on malta/mipsel
Runtime-tested on malta/mipsel

Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
Acked-by: Hauke Mehrtens <hauke@hauke-m.de>

target/linux/generic/pending-3.18/653-disable_netlink_trim.patch

@@ -1,15 +1,12 @@
 --- a/net/netlink/af_netlink.c
 +++ b/net/netlink/af_netlink.c
-@@ -1721,27 +1721,7 @@ void netlink_detachskb(struct sock *sk,
+@@ -1107,23 +1107,7 @@ void netlink_detachskb(struct sock *sk,
  
  static struct sk_buff *netlink_trim(struct sk_buff *skb, gfp_t allocation)
  {
 -	int delta;
 -
  	WARN_ON(skb->sk != NULL);
--	if (netlink_skb_is_mmaped(skb))
--		return skb;
--
 -	delta = skb->end - skb->tail;
 -	if (is_vmalloc_addr(skb->head) || delta * 2 < skb->truesize)
 -		return skb;
@@ -24,7 +21,6 @@
 -
 -	if (!pskb_expand_head(skb, 0, -delta, allocation))
 -		skb->truesize -= delta;
--
+ 
  	return skb;
  }
-